Fire and water proof insulating covering for metallic surfaces.



No. 754,868. PATENTED MAR. 15, 1904. J. A. HEANY.

FIRE AND WATER PROOF INSULATING GOVERING FOR METALLIC SURFACES.

APPLICATION 111m) my 10, 1902.

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UNITED STATES Patented March 15, 1904.

PATENT OFFICE.

JOHN ALLEN HEANY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE TETER-HEANY DEVELOPING COMPANY, OF CHARLESTON, TVEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

FIRE AND WATER PROOF INSULATING COVERING FOR METALLIC SURFACES.

SPECIFICATION forming part of Letters Patent No. 754,868, dated March 15, 1904.

Application filed May 10, 1902. Serial No. 106,670. (No specimens.)

To all whom it may concern:

Be it known that I, JOHN ALLEN HEANY, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Insulated Electric Conductors, of which the following is a specification.

My invention has relation to the production IQ of insulated electric conductors which are fire,

acid, and water proof.

The principal object of my invention is to provide an efficient insulated electric conductor which is non-combustible or fireproof, as

well as moisture or water proofthat is, an

insulated electric conductor which is not affected by moisture or water and is not destructible by heat generated within the conductor by the passing of an electric current through the same or by heat from an external source.

As is well known, asbestos is a substance which is non-combustible. It has been found difficult to cause the necessary adhesion of as- 2 5 bestos to a metal surface or wire to avoid in the bending or twisting of the wire or surface the asbestos cracking or peeling off.

My invention has been designed to provide an electric conductor which is uniformly in- 3 sulated, so that no matter how the coated wire or conductor is bent or twisted it is not injuriously affected, and is fire, water, and acid proof.

The nature, scope, and characteristic features of my invention will be more fully understood from the following description, taken in connection with the accompanying drawing, illustrating, partly in elevation and partly in section, an insulatedelectric conductor em- 4 bodying the features of my said invention.

Referring to the drawing, (0 represents a bare wire of any suitable metal. To this wire is applied a cohering adhesive mass Inconsisting of a solution of glue, gum. and resin, or certain of them, according to the particular use to be made of said solution as a coating for a metallic wire for electric or other purposes. The cohering adhesive mass as a coating, consisting essentially of a glue, gum, andresin,or certain of said materials, is mixed with 5 an acid, as boracic or sulfuric acid. After the wire a has been coated with the cohering adhesive mass as a coating fiocculent fibrous material 0, such as asbestos, is twisted onto and into the cohering adhesive mass, as a coating 6, on the wire and projects in a fluffy mass from the same, as illustrated. Onto the asbestos c is then applied a nondestructible tire and water proof paste or cement (Z, consisting of the substances constituting the cohering adhesive coating 6, together with a clay, such as kaolin,

six parts, by weight; oxide of alumina, two parts, by weight, and sulfid of lime, four parts, by weight. The cohering coating Z), nondestructible iire and water proof paste or cement (Z, and the asbestos 0 under pressure and heat are caused to thoroughly intermingle each with the other, as shown at cin the drawing. The substances used on account of their nature intermingle intimately and com- 7 pactly with each other and the asbestos on the wire a to render the same water, fire, and acid proof without affecting the flexibility of the wire as a conductor, and even with abnormal heating of the covered conductor the insulation is still reliable and effective. The cohering coating 7) and the nondestructible fire and water proof paste or cement (Z may be used either in a thick or thin mass, according to requirements. 60

In instances where the covering is required to possess appreciable flexibility, as in the insulating of electric wires adapted to be bent into helices or coils, it is found that equal proportions, by weight, of the gummy or gluey 5 mass or composition give good results.

Having thus described the nature and ob ject of my invention, what I claim as new, and desire to secure by Letters Patent, is

An electric conductor having a waterproof 9 cohering adhesive mass formed of gluey substances applied as a coating to the conductor, flocculent asbestos agglomerated with said coating and a covering formed of the waterproof gluey substances combined with firemy signature in the presence of two subscribproofing materials agglomerated W1th the as- 1ng Witnesses.

bestos and the gluey coating of the conductor JOHN ALLEN HEANY to form an insulating mass, wherein the ma- 5 terials and asbestos are thoroughly inter- Witnesses:

mingled and firmly united to the conductor. J. WALTER DoUGLAss,

In testimony whereof I have hereunto set THoMAs M. SMITH. 

